Casing chink constrains Songkhla production

Coastal Energy has completed a development well on its Songkhla field in block G5/43 in the Gulf of Thailand and started work on an injection well.

Offshore staff

HOUSTON -- Coastal Energy has completed a development well on its Songkhla field in block G5/43 in the Gulf of Thailand and started work on an injection well.

The completed well, Songkhla A-02, was drilled to a total measured depth of 8,804 ft (2,684 m) and logged around 98 ft (30 m) of net pay in the Lower Oligocene primary reservoir.

Casing has been run, and the well has been perforated; however, a sudden increase in water production occurred as a result of a suspected chink in the cement behind the production casing. This has limited flow currently to 1,500 b/d, half the anticipated output.

The Songkhla A-05 injection well has been drilled to a total measured depth of 8,770 ft (2,673 m), and will be logged and evaluated to determine prospectivity of the Lower Miocene interval, a potential secondary target.

Following completion of this and the A-04 development well, Coastal expects to perform a remedial cement squeeze and repair operation on A-02, which will likely take seven to eight days.

On the same block, the company has contracted EOC for a heavy-lift barge to install fixed platforms at the Bua Ban field, probably during the early part of 2010. This will be followed by development drilling on the field.

10/07/2009

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